Built to reach the inbox
Domain authentication, warm-up, list hygiene and monitoring — everything that keeps your emails out of spam, without being an expert.
What deliverability in MailNesto does
Deliverability decides whether your email reaches the inbox at all. Gmail, Outlook and Yahoo judge every message on who sent it, whether the domain is authenticated, how people reacted to your recent campaigns and what the email itself looks like. A well-written Diwali offer that lands in spam earns nothing.
MailNesto puts the checks mailbox providers care about in one place: DNS records for your domain, a branded link domain, warm-up and daily caps, a spam check before you send, a prediction of where each provider will file the email, and tools that keep bounced and risky addresses off your list. Each check says what is wrong in plain words and what to change.
Since 2024, Gmail and Yahoo have required bulk senders to authenticate their domain, publish DMARC, offer one-click unsubscribe and keep complaints low. MailNesto adds the unsubscribe header for you and turns the rest into a checklist.
Deliverability, done properly
Domain authentication
Step-by-step SPF, DKIM and DMARC setup with live checks, so Gmail and Yahoo trust your mail.
Automatic warm-up
New domains and IPs start small and grow daily, building reputation the safe way.
Clean lists
Bounces, complaints and invalid addresses are handled automatically; verify lists before you send.
Inbox placement tests
Send to seed mailboxes and see whether you land in the inbox, promotions or spam.
Your own servers, if you like
Connect Amazon SES, SendGrid, Mailgun, Postmark, Brevo, ZeptoMail, Netcore and more — with failover.
Health monitoring
Bounce and complaint rates are watched for you, with warnings before they become a problem.
SPF, DKIM and DMARC, checked against live DNS
Add the domain you send from — yourbrand.in, say — and MailNesto creates a private signing key for it and shows three records to copy into your DNS provider: a DKIM key, an SPF line with the include for your sending service, and a starter DMARC policy (p=none) that sends reports to an address on your domain.
Press Verify and each record is looked up on public DNS. You see what was found, not just a red cross: a DKIM key that doesn’t match, two SPF records to merge, or a missing MX record that would bounce replies. Once DKIM matches, every email from that domain is signed.
- Signing keys generated for you, one per domain
- Free mailbox domains such as gmail.com are refused — you can only authenticate a domain you own
- Domain and sending-IP checks against public blocklists such as Spamhaus
- A lookup tool for any domain’s MX, SPF, DMARC and BIMI, with warnings for more than ten SPF lookups or an SPF ending in +all
Links on your own domain, with HTTPS
Tracked links normally use the platform’s address. With a branded tracking domain they use a subdomain of yours, such as links.yourbrand.in, so the link a reader hovers over matches the brand in the From line.
Set-up is one CNAME record. MailNesto checks that it points to the right place and, once it does, a security certificate is issued for the subdomain automatically, so every link opens over HTTPS. Until the record is verified, links keep using the platform address — nothing breaks while DNS catches up, which can take up to an hour.
- One CNAME record, checked from the app
- Automatic HTTPS certificate for the subdomain
- A clear message if the CNAME points somewhere else
- Each subdomain can belong to only one account
Your own sending service, warmed up gradually
Send through the platform’s shared servers or, depending on your plan, your own: Amazon SES (including the Mumbai region), SendGrid, Mailgun, Postmark, Zoho ZeptoMail, Netcore or any authenticated SMTP server. Several servers can share the load by priority and weight; if one fails, the next takes the email, and after three failures in a row owners are told.
A new domain or IP needs a gentle start. Pick a preset — Gentle (30 days, 50 to 50,000 a day), Standard (21 days, 200 to 100,000) or Fast (14 days, 500 to 100,000) — or set your own ramp. When the day’s cap is used, the rest of a campaign waits for the limit to reset instead of failing.
- Connection test and a test email through one server only
- Daily limit and messages-per-second rate per server
- Bounce and complaint webhooks for each provider, and servers limited to chosen From domains
A spam check that names the problem
The content check scores a campaign out of ten and lists everything it looked at. It flags subjects in capitals or with “!!!”, known spam phrases, emails that are mostly images with little text, URL shorteners, scripts or forms that email apps strip out, and HTML over 102 KB, which Gmail clips — hiding the end of the email, unsubscribe link included.
It also catches unfinished links: social icons left at “https://” from a template, “#” buttons and example.com placeholders, which are easy to miss in a busy festival week. Each failed item says what was found, such as “3 of 7 words are in capitals”, so the fix is obvious.
- Score with a good, fair or poor verdict
- Checks for an unsubscribe link, postal address and image alt text
- Warns when the From domain isn’t authenticated
- Flags subjects over 70 characters, which get cut off on phones
See where each provider is likely to file it
The inbox placement prediction looks at the campaign’s real audience and groups it by mailbox provider — Gmail, Outlook and Hotmail, Yahoo, Apple iCloud, Rediffmail, Zoho Mail and company domains — with each one’s share of your list. For each it estimates the chance of reaching the inbox and the likely folder: Gmail’s Primary, Updates or Promotions tab, Outlook’s Focused or Other, or spam.
It uses the signals providers look at — your own From domain, DKIM, SPF, DMARC, blocklists, 30-day bounce and complaint rates, opens and the content score — and says why: prices and several images, for example, make Gmail’s Promotions tab likely, which is normal for a sale.
For a real-world check, add seed mailboxes you can sign in to. A seed test sends them the campaign as subscribers would get it, then reports the folder it landed in and whether authentication passed.
- Pass, warn or fail for each signal, with the reason
- Complaint rate compared with Gmail’s 0.3% limit
- Up to three seed tests running at once
Clean lists, suppression and bounce handling
List verification checks every address in a list without sending anything. Invalid means bad syntax, a misspelled domain such as gmial.com (with the corrected address suggested), a disposable inbox, a domain that doesn’t accept email, or an earlier hard bounce. Risky means a shared role address like info@ or sales@, or someone who once marked you as spam. Then remove, suppress or unsubscribe each group in one step, or export it as CSV.
Hard bounces and complaints are processed automatically, and those addresses join the suppression list, which can block one person or a whole domain from every future send. With your own servers, connect a mailbox for bounces and replies: rules can unsubscribe people who reply “stop”, tag those who write “interested”, and suppress addresses whose owner has left the company.
- Valid, risky, invalid and unknown counts per list
- Optional outside verification service for addresses that pass the built-in checks
- Auto-replies are ignored by reply rules
Up and running in three steps
- 1
Authenticate
Add your domain and copy three DNS records.
- 2
Warm up
Sending ramps up gradually on new domains.
- 3
Stay healthy
Bounces, complaints and blocklists are watched for you.
Deliverability for every kind of business
A Jaipur block-print brand sending three sale emails in Diwali week can run the prediction on each and watch complaints while volume peaks.
Before announcing a Navratri dandiya night to last year’s ticket buyers, an organiser can verify the list, suppress invalid and role addresses, and warm up a new sending domain over three weeks.
A Bengaluru firm emailing company addresses can watch the “company and other domains” line of the prediction, and suppress the whole domain of a customer who asks to stop.
An agency onboarding a client can verify the client’s domain, move links to links.clientbrand.in and run a seed test before the first campaign.
An institute in Kota with years of enquiry addresses typed on phones can catch typo domains like gmial.com and yaho.com before restarting its newsletter.
A business sending lakhs of emails a month can connect its own Amazon SES account in the Mumbai region, add a second service as backup, and let failover move traffic if one has trouble.
- SPF, DKIM and DMARC checks
- Custom tracking domain
- One-click unsubscribe (RFC 8058)
- Bounce and complaint processing
- Blocklist monitoring
- Spam score check
- Warm-up plans
- Multiple sending servers with failover
- Seed inbox placement tests
- Suppression lists
- Reply and bounce mailboxes
- Sending health dashboard
In many email tools, deliverability is something you find out about afterwards: a high bounce rate in a report, or a customer mentioning that your email was in spam. Authentication is often a page of DNS records with a single “verified” tick, and checking where an email will land means paying for a separate seed-testing service.
MailNesto moves those checks before the send. DNS results show the record that was actually found, the spam check and inbox placement prediction run on the campaign you are about to send and its real audience, and seed tests use mailboxes you own. If you bring your own sending service, warm-up, daily caps and failover are set in the same place, and its bounces flow back into your suppression list.
Tips for better results
- 1
Consider a subdomain such as news.yourbrand.in for campaigns, so your main domain’s reputation is protected while you learn.
- 2
Start DMARC at p=none, read the reports for a few weeks, then tighten it once every service that sends as you is authenticated.
- 3
Keep one SPF record per domain. When you add a sending service, add its include to the existing record instead of creating a second.
- 4
Warm up with your most engaged contacts first — people who opened in the last 30 days — and add older segments as the daily cap rises.
- 5
Verify any list you haven’t emailed for six months before using it again.
- 6
Aim for spam complaints under 0.1%. Gmail’s hard limit is 0.3%, and recovering from it takes weeks.
- 7
Make the unsubscribe link easy to find. A reader who can’t leave will press “Report spam” instead.
Questions about deliverability
Do I need my own domain?
We strongly recommend it — sending from your own authenticated domain is what Gmail and Yahoo require for bulk mail. Setup takes a few minutes.
Can I use my existing email provider?
Yes. Connect SES, SendGrid, Mailgun and others over SMTP or API; we route and fail over between them.
What exactly do Gmail and Yahoo require from bulk senders?
If you send around 5,000 or more emails a day to Gmail addresses, Gmail expects SPF and DKIM on your domain, a DMARC record (p=none is enough to start) aligned with your From address, one-click unsubscribe honoured within two days, and a spam complaint rate below 0.3%. Yahoo’s rules are similar. MailNesto adds the one-click unsubscribe header to every campaign and checks the rest for you.
Is the inbox placement prediction a guarantee?
No. It is an estimate based on signals mailbox providers are known to use and on your recent bounce, complaint and open rates. Providers also weigh things nobody outside can see, so treat it as a checklist of what to fix. A seed test shows where one real copy landed.
Why does my email go to the Promotions tab?
Gmail files offers, prices, coupons and image-heavy designs under Promotions — that is where most sale emails belong, and people do browse it. A short, text-led email from a person is more likely to reach Primary. The prediction tells you which tab to expect and why.
What happens when an address hard-bounces?
The contact is marked bounced and the address is added to your suppression list, so no campaign, automation or transactional email goes to it again. A soft bounce, such as a full mailbox, doesn’t suppress the address unless it happens three times within 30 days.
How long does warm-up take?
Usually two to four weeks. The presets run for 14, 21 or 30 days; which suits you depends on how new the domain or IP is and how engaged your list is. You can switch plans or restart one at any time.
What does the deliverability overview show?
Thirty days of campaign and automation email: hard bounce, soft bounce, complaint, unsubscribe and open rates, a 14-day chart of sends against problems, and the latest bounces and complaints with their contact and campaign.